Means for indicating error in direction of rotation of shafts and other mechanical rotary members



July 10, 1923.

J. M KECHNIE ET AL MEANS FOR INDICATING ERROR IN DIRECTIONAOF ROTATION OF SHAFTSAND OTHER MECHANICAL ROTARY MEMBERS Filed Aug. 22,- 2 Sheets-Sheet 1 Fwy" MJQM July 10, 1923.

- 1.461.448 J. M KECHNIE ET AL MEANS FOR INDICATING ERROR IN DIRECTION OF ROTATION 0F SHAFTS AND OTHER MECHANICAL ROTARY MEMBERS Filed Aug. 22 1921 2 Sheets-Sheet 2 1771/2/7/0/19: )YPC/W Patented July 10, 1923.

UN rE-aST-ATES PAT JAMES MOKEGHNIE AND WILLIAM FLOYD RABBIDGIE, OF'BARROW-IN-EURN'ESS, VICKERSLIMITED, OF LONDON, ENGLAND.

I-LA-'. ND, .ASSIGNORS TO. MEANS FOR Innicirrmennnon MECI-IANI-CAL ROTARY MEMBERS.

Application filed August 22,

To all mam it may concern Beit known that we, JAMES MoKnoHNIn and. lVILLIAM FLoYD RABBID E, bothsubjects theevent of.

ofthe King of, Great Britain,.residing at Naval Construction. fvVorks, Barrow-in-Furness, inthe county of Lancaster, England, have invented certain new and useful 'Im-. provements in. Means for Indicating Error in Direction of Rotation of Shafts and Other Mechanical Rotary. Members,. of which the following is a specification. I j

This invention-relates to means for indicating error in the, direction of rotation of shafts or other, mechanical: rotary members and more especially error in the directionof running of enginesso ast-o give warning in an engineer machine running in a direction not authoriaedbythe signal from the telegraphic apparatus provided in cases where orders for :the engineer machine are transmitted .from a distance, as for example, onboard ship, or where such error may occur; between the engine or machine and any reversing or control mechanism. 7

According to this invention the telegraphic or control apparatus is provided with means by which it, may control alternatively either one of a pair of signallingor warning clevices which are also actuated by the rotating member so that'ifj the rotating member is turning in a direction contrary tothat corresponding to the telegraphic or control indication the corresponding signalling or warning device is operated and. attention called to the error in direction. The mecha nism mayalso be arranged to give warning if rotation continues after stop has been signalled.

A convenient apparatus for this purpose comprises a bell operated by either one of a pair of spring hammers or clappers each provided with a tooth or stud adapted to be struck by a toothed wheel or equivalent striking member on the shaft or other rotating member, the two toothed wheels or striking members being mounted upon oppositely directed free wheel clutches so that only one clapper or equivalent signalling or warning device is operated at a time. ither one of the clappers or equivalent devices is held up by a lever or equivalent device on the telegraphic or control gear when the gear indicates motion in either direction, which lever may, for example, act against a cam piece on a ing pulleys F.

The lever f on'the end of the telegraphic.

1921:. seriei no. 494,109.

the clap per arm or spring so asetohold the corresponding clapper from operation by the rotating" striker.

In order that the aidfinventio my: be

cle rly: understood and readily carried into effect the same will now be described more fully; with reference to the accompanying drawings in which t Figure 1 is aside and Figure 2 a front elevation, with outer casing in section, of the device embodying this invention. i Fig.3 shows diagrammatically the connections to a distant ships telegraph oncontrol apparatus. V t i v l A is the rotatingmembershown in the form of a shaft. B, B are toothed wheels mountedon the shaft through free,-wl1eel clutches atb arranged to clutch'in opposite ENG- directions. C is the warning bell. v D, Df are a pair of clappers in the form of long. springs provided with hammer studs which strike upon the bell. Of E is. the casing within which the spring clappers are mounted,their of the casing, while, through-the openings e inthe upper side of the casing. e, e are bearings where the shaft passes through the casing. F is the terminal: shaft of the telegraphic .control gear, on which shaft is mounted the providedwith studs: 7"" adaptedto meet the cam pieces or wedges (Z pers D, D. v

The shaft F is turned into one position or lower ends d being. screwed upon thebase v the clappers extend on the spring claplever. f i

the other by the lever G of the ships telegraph through the pulley g and the flexible connection or cord 7 passing over the guidor control shaft F is turned in one directlon or the other according to the, direction in which the engine or other apparatus is to ure 1, this clapper is. held back clearof they bell C and the tooth or stud 03 which when the clapper is in operative position is struck v by the corresponding toothed wheel B, is

held clear of the said Wheel so that it is unaflected by its rotation. If the shaft A is turning in the direction required the Wheel B- is clutched therewith, so that the Wheel is driven With the shaft.

The second clapper D is left in operative position and its 'stu'd (Z is therefore within the reach of the toothed Wheel B. If, however, the shaft is turning in the proper direction according to the position of the telegraph lever G the Wheel B is free and is therefore merely held by the Stud (5 Without affecting the clapper. It on the other hand the direction of rotation of the shaft A does not correspond to the correct instructions, the clutch of the Wheel B is in operation and the wheel is there fore turned with the shaft, operating upon the stud. d of the clapper D and causing the clapper to give repeated blows on the Warning hell or equivalent device C On reversing the required direction of movement, the shaft F of the telegraphic or control gear is turned to bring the lever {)into the position which releases the clapper and shifts the clapper D out of operaeve position.

If the shaft F and lever f are in the mid tile position it may be arranged that the studs f just clear the cam pieoes d this corresponding to the stop position, so that neither clapper is held up by the lever and rotation in either direction of the shaft A causes a Warning to be given. 7

The signal or Warning apparatus, while shown of bell and clapper type, may be of any suitable character to give either an audible or visible Warning and the rotati'fig toothed wheels may berepla'ced by any eqiiiva-lefit device adapted to effect the operation of the warning apparatus in either direction of rotation of the shaft.

What We claim and desire to secure by Letters Patent 'of the United States is":-

1. In indicating mechanism for rotary members, a pair of indicating devices, a pair of oppositely acting clutch members on the rotary member, adapted to operate either one of the indicating devicesaiternatively accordin to the direction of rotation and a distant control device adapted to place either one of the indicating devices out of operation by the corresponding clutch member,

2. In indicating mechanism for rotary members, a sound warning bell, a pair of clappers, ed rotary striking devices on the rotary a p'air'of tree wheel cl u'tch mount-1 member, the clutches of which work inop= posite directions, {each of the said striking members beingiadapted to operate one of the said clappers, and a distant control member adapted to move back either one of the clappers alternatively out of operative Contact With its striking member.

3. In indicating devices for retary 1mm: bers, swarming ball, a pair of spring elapp'ers adapted to strikethe said bell, each clapper having an o erating stud, a 'p'ai'rof toothed Wheels on the rotary 'in'etriber adap't-' ed to operate the clappers 'thror'rgh the striking studs, opposite y directed 'fr'ee wheel clutches on which thesaiii toothed wheels are mounted, a distantcontrol 'mem ber adapted to turn into either one oi two positions according to the ditection in which the r tary member is to turn, and means provided on thejdis-tant coritrol'niember' wherebycne r ther-0 f the ciappers is pressed'ba'ck-out {of operative position ac: COffdifig to the til-ii" ti-ofi f fO'ta-tiofi re: qaired ier the; rotarymemter,

J AMES MGKEGHNLE,

WILIJIAMFLQEHD RABBTIDGE, 

